49 citations · 188 across the 10 of their papers we have counts for
11 papers
Consequences of Minimal Length Discretization on Line Element, Metric Tensor and Geodesic Equation
Abdel Nasser Tawfik, Abdel Magied Diab, Sameh Shenawy +1
When minimal length uncertainty emerging from generalized uncertainty principle (GUP) is thoughtfully implemented, it is of great interest to consider its impacts on {\it "gravitat…
Concircular curvature on warped product manifolds and applications
Uday Chand De, Sameh Shenawy, Bulent Unal
This study aims mainly at investigating the effects of concircular flatness and concircular symmetry of a warped product manifold on its fibre and base manifolds. Concircularly fla…
The -curvature tensor on relativistic space-times
H. M. Abu-donia, Sameh Shenawy, A. A. Syied
This paper aims to study the -curvature tensor on relativistic space-times. The energy-momentum tensor T of a space-time is semi-symmetric given that the -curvature tensor is…
Gray s decomposition on doubly warped product manifolds and applications
Hoda K. El-Sayed, Carlo Alberto Mantica, Sameh Shenawy +1
A. Gray presented an interesting invariant decomposition of the covariant derivative of the Ricci tensor. Manifolds whose Ricci tensor satisfies the defining pr…
On generalized quasi-Einstein GRW space-times
Uday Chand De, Sameh Shenawy
Recently, it is proven that generalized Robertson-Walker space-times in all orthogonal subspaces of Gray's decomposition but one(unrestricted) are perfect fluid space-times. GRW sp…
On symmetries of generalized Robertson-Walker Space-times and applications
H. K. El-Sayied, S. Shenawy, N. Syied
The purpose of the present article is to study and characterize sev- eral types of symmetries of generalized Robertson-Walker space-times. Con- formal vector fields, curvature and…
Conformal vector fields on doubly warped product manifolds and applications
H. K. El-Sayied, Sameh Shenawy, Noha Syied
In this article, we present a complete study of two disjoint classes of conformal vector fields on doubly warped product manifolds as well as on doubly warped space-times. Then we…
Sequential Warped Products: Curvature and Killing Vector Fields
Uday Chand De, Sameh Shenawy, Bülent Ünal
In this note, we introduce a new type of warped products called as sequential warped products to cover a wider variety of exact solutions to Einstein's equation. First, we study th…
Killing Vector Fields on Warped Product Manifolds
Sameh Shenawy, Bulent Unal
The present article provides a study of Killing vector fields on warped product manifolds as well as characterization of this structure on standard static and generalized Rober…
Convex and starshaped sets in manifolds without conjugate points
Sameh Shenawy
Let be the class of complete simply connected dimensional manifolds without conjugate points. The hyperbolic space as well as Euclidean space ar…
On the boundary of closed convex sets in
M. Beltagy, S. Shenawy
In this article a class of closed convex sets in the Euclidean -space which are the convex hull of their profiles is described. Thus a generalization of Krein-Milman theorem\cit…